【作者】 魏群； 刘光廷； 陈兴华； 王宙；

【Author】 Wei qun Liu guangting Chen xinghua Wang zhou

【机构】 华北水电学院； 清华大学；

【摘要】 在已有的散体元法基础上,作者提出了一种模拟节理岩体渐近破坏全过程的散体元方法,它包括了岩体稳定分析的两个阶段:1.节理岩体在失稳破坏之前处于"静力抗衡"阶段,节理岩体在外荷作用下只产生相对的小变形,稳定主要取决于节理岩体本身的c、φ强度指标,这个阶段主要采用应力调整、外荷载及边界条件调整的方法,判断岩体裂隙发生发展的情况,当形成破坏通道之后,产生失稳滑动。2.岩体稳滑动是渐近破坏过程的第二阶段,这个阶段以力—位移关系和牛顿第二定律进行动力松驰,按时步迭代求解。更多还原

【Abstract】 On the basis of the previous Discrete Element Method,an approach which is adapted to simulate the whole procedure of progressive failure of joint rock is proposed in this paper.It includes two stages in stability analysis of rock mass,i.e.joint rock mass is in the match stage for static forces before failure and creates relative small-deformation under external loads.The stability of joint rock mass is dependent on its own cohesion and friction factor.In this stage(i.e.the first stage),the arising and developing of rock fracture are detected by the methods of adjustment for stress,external loads and boundary conditions.When the failure path arises,the sliding fracture of rock mass occurs.The sliding failure of rock mass denotes the second stage of progressive failure.The phenomena happening in this stage can be simulated by the method of the dynamic relaxation and time-step iteration based on the force-displacement law and Newton ’s second law.更多还原